Tap for tanks, oil-drums, and the like.



' M. GOODWIN. TAP FOR TANKS, OIL DRUMS, AND THE LIKE.-

I APPLICATION FILED JANA, 1907.

Patented June 15,1909.

. tap in elevation. tional side elevation a modliication of my 1n-UNITED STATES PATENT OFFICE.

MARY GOODWIN, OF ERDINGTON, ENGLAND.

TAP FOR TANKS, OIL-DRUMS, AND TIE LIIE.

T 0 all whom it may concern:

Be it known that I, MARY Goonwm, a subject of the King of Great Britainand Ireland, residing at 247 George road, Erdington, near Birmingham, inthe county of Warwick, England, have invented new and usefulImprovements in and Relating to Taps for Tanks, OiLDrums, and the Like,of which the following is a specification.

This invention relates to taps for tanks oil drums and the like, thechief object being to enable such taps to be secured in position in amore simple and inexpensive manner than heretofore while providing anefficient and water tight connection.

Referring to the drawings which form a part of this specification,Figure 1 represents a side elevation of my improved tap. Fig. 2represents a back elevation. Fig. 3 represents a side view showing themethod of cutting the hole in the side of the tank for the reception ofthe screw-ended spigot of the tap. Fig. 4 represents the plug of theFig. 5 represents in secvention showing an adapter to adapt the conicalscrew portion'z' e. the spigot end to a larger bore of tap. Fig. 6 is aback elevation of the adapter and spiral screw of the spigot end.

According to this invention the spigot A of the tap is provided with ascrew threaded portion formed in such a manner that as the said spigot Ais being screwed into a suitably formed hole in the tank or drum, acontinually increasing gripping or bearing surface u on the interior ofsaid tank or drum is a%orded until a shoulder on the tap as at Aprovided with a washer of leather A or other suitable material isbrought into contact with the outer surface of the tank or drum and afirm and water tight connection thereby obtained.

The screw threaded portion of the spigot A of the tap preferablycomprises a spiral or screw whereof the distance of the outer edge fromthe axis of the spigot increases uniformly from the outer end of thespigot A toward the shoulder A on the tap, so that the outline of thethread A has a tapering or conical appearance and the depth of thethread increases correspondingly as will be seen in the drawings. Theperiphery of each thread is beveled from front to back only and thewalls thereof are parallel with each other and this arrangement providesSpecification of Letters Patent.

Application filed January 4, 1907.

Patented June 15, 1909.

Serial No. 350,851.

the gripping action hereafter referred to by presenting a square surfaceon the inner side of the thread so as to prevent any tendency to expandthe hole formed in the tank which with a V or other thread would-be thecase. The groove A between any two consecutive threads A may be variedin width in accordance with the thickness of the material of which thetank or drum is composed.

The hole in the tank or druma sectional part of which is seen at B Fig.3is formed by means of any convenient boring or cutting device, but adisk such as 0 having two points turned down at right angles to the faceof the disk at the periphery to form cutter-blades C thereon ispreferably employed and the disk is screwed by finger pieces C to atapered and pointed screw D formed on or attached to the lower end ofthe tap plug so that a separate boring or cutting device is unnecessary.The tap itself or the operating handle l) upon being turned forms themanipulating medium (see Fig. 3.)

D is a washer or nut for use in connection gitlgj the attachment of thecutter disk C,

By forcing in the point of the cuttingscrew D a purchase and start isobtained in the side of the tank or drum until by screwing onward eitherby turning the whole ta or the operating handle D the cutters (T comeinto operation and by still screwing on, the necessary hole is bored inthe side of the tank or drum as described. The diameter of the holewhich is cut in the tank or drum is approximately e ual to or isslightly greater than the externa diameter of the free end A of thespigot A and the beveled thread A of the spigot is referably so shapedby having a square sur ace on the inner side of the thread as describedthat it can produce a slit in the periphery of the hole as the s igot isbeing screwed therein. This slit al ows of the beveled threads A whenthose of larger diameter than the hole are reached in screwing in, topass into or under said slit so that when finally screwed home in thetank or drum, the inner side of the hole around the spigot is completelypacked by the gri ping or bearing of the screw threads of arger diameteraround the hole and by the overlapping of the same, thus making anabsolutely tight connection on the inside and outside.

A suitable washer such as A before referred to, or other form of packingmaterial is provided against which the shoulder A on the tap is pressedwhen the latter has been firmly secured to the tank or drum in the abovemanner.

A number of holes E may be formed in the spigot A of the tap or in thespigot of the adapter for facilitating the withdrawal of the contents ofthe vessel when the level of the contents falls below the level of thetap, and the vessel has to be tilted.

The above description refers to a conical spigot integrally a part ofthe tap, as will readily be understood, but I sometimes find itadvantageous to make the spigot end separate from the tap. In this caseI form the spigot end, which may be called an adapter,

as shown clearly in Fig. 5, that is to say, with a screw threaded neckportion and shoulder F F and I form corresponding threads F on the tailpiece F of the tap, the two parts forming the tap upon being screwedtogether, with suitable washers intervening, if reuired, to make theconnection water tight.

he conical screw threaded spigot A is precisely the same with regard tothe screw threads as already described. The object and advantage of thisform of adapter is to provide means whereby taps of different sizes ofinterior bore may be connected as required to an adapting spigot end ofthe kind described to suit a uniform or standard bore so that the saidtap bodies are interchangeable as occasion may demand.

The adapter may be made of steel in special cases where great strengthis required '5. e. for heavy iron drums Having now described myinvention what I claim as new and desire to secure by Letters Patent isI 1. A tap for tanks and the like corn rising a screw threaded portionhaving its t reads each formed with parallel walls and having itsperiphery beveled from front to rear, and said threads increasing indiameter from the free end of the spigot so as to provide increasinglydeep grooves between said threads.

2. In taps for tanks and the like in combination a separate spigot endhaving screw threads thereon, each thread having parallel walls and abeveled periphery, and the threads increasing in diameter from the freeend of the s igot to the front, and a tap body adapted to e screwed tosaid spigot end.

In testimony whereof I have signed my name to this specification in thepresence of two subscrlbing witnesses.

MARY GOODWIN.

Witnesses:

Enwn. BURTON PAYNE, W. H. THORNBERY.

